1155445061 has 4 divisors (see below), whose sum is σ = 1155630624. Its totient is φ = 1155259500.

The previous prime is 1155445037. The next prime is 1155445121. The reversal of 1155445061 is 1605445511.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1605445511 = 83 ⋅19342717.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1155445061 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1155445661) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 83105 + ... + 96006.

It is an arithmetic number, because the mean of its divisors is an integer number (288907656).

Almost surely, 2^1155445061 is an apocalyptic number.

It is an amenable number.

1155445061 is a deficient number, since it is larger than the sum of its proper divisors (185563).

1155445061 is an equidigital number, since it uses as much as digits as its factorization.

1155445061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 185562.

The product of its (nonzero) digits is 12000, while the sum is 32.

The square root of 1155445061 is about 33991.8381527095. The cubic root of 1155445061 is about 1049.3404962084.

The spelling of 1155445061 in words is "one billion, one hundred fifty-five million, four hundred forty-five thousand, sixty-one".